Sequence-specific RNA-binding protein that regulates translation and mRNA stability by binding the 3'-UTR of mRNA targets. May be required to support proliferation and self-renewal of stem cells. Strongly down-regulated in keratinocytes upon ultraviolet B radiation. Binds in a sequence-specific manner to the 3'-UTR of some mRNAs. 2 isoforms of the human protein are produced by alternative splicing. Note: This description may include information from UniProtKB.